April 2005 Subscription Information Volume 31, Number 4
Continuing Medical Education   CME Expiration: October1, 2005

JCRS CME Quiz

Quiz must be completed individually and answers based on personal knowledge gained from reading the selected articles.

On the answer sheet, please write in the letter corresponding to the most correct answer. Return only the completed answer sheet, payment, and CME verification information to ASCRS. It is not necessary to return the printed quiz.

Questions developed by Yanina Kostina-O’Neil, MD, and David E. Silverstone, MD, Chairman, ASCRS Continuing Medical Education.

Masked comparison of silicone hydrogel and etafilcon A extended-wear bandage contact lenses after photorefractive keratectomy
Andrew T. Engle, OD, John M. Laurent, OD, PhD, Steven C. Schallhorn, MD, Steven D. Toman, OD, James S. Newacheck, OD, David J. Tanzer, MD, James L. Tidwell, MD

1. According to the article,
a. The mean epithelial defect size at surgery was larger in patients using ACV bandage contact lenses.
b. On postoperative day 1, the mean size of the epithelial defect was larger in eyes with N&D lenses.
c. On day 1, 3 eyes had completely reepithelialized.
d. On day 3, 70 eyes with N&D lenses had reepithelialized.

2. According to the article, the mean discomfort index was _______ in eyes with ACV lenses on days 1 and 2 compared with N&D lenses.
a. higher
b. lower
c. slightly lower
d. the same

3. What is the oxygen transmissibility coefficient for silicone hydrogel contact lenses (N&D, Ciba Vision)?
a. 125
b. 150
c. 175
d. 200

Pachymetric evaluation prior to laser in situ keratomileusis
Maria Jonsson, Anders Behndig, MD, PhD

4. According to the article, the thinnest point of the cornea was located in thea. superonasal quadrant
b. superotemporal quadrant
c. inferotemporal quadrant
d. inferonasal quadrant

5. What is the incidence of the most feared complications of LASIK (postoperative keratectasia, irregular astigmatism, and decreased vision)?
a. 0.1%
b. 0.3%
c. 0.53%
d. 0.66%

6. What is the recommended thickness of corneal tissue that should be left to avoid keratectasia?
a. 250 mm
b. 280 mm
c. 300 mm
d. 350 mm

Assessment of central corneal thickness using optical coherence tomography
Gary R. Fishman, MD, Mauricio E. Pons, MD, John A. Seedor, MD, Jeffrey M. Liebmann, MD, Robert Ritch, MD

7. According to the article, what did Bland-Altman analysis show in assessment of central corneal thickness?
a. high level of correlation between US pachymetry and Orbscan
b. high level of correlation between US pachymetry and OCT technique
c. poor level of correlation between US pachymetry and OCT technique
d. high level of correlation between Orbscan and OCT technique

8. What are the available techniques for measuring central corneal thickness?
a. confocal microscopy
b. US biomicroscopy
c. optical ray path analysis
d. all the above

9. The study has shown that OCT is
a. superior to all currently available methods of measuring central corneal thickness (CCT)
b. a valuable and accurate method for measuring of CCT
c. less accurate than Orbscan in measuring of CCT
d. less accurate than confocal microscopy for measuring of CCT

Effect of cataract surgery incision location and intraocular lens type on ocular aberrations
Konrad Pesudovs, PhD, Holger Dietze, MSc, Owen G. Stewart, FRCOphth, Bruce A. Noble, FRCOphth, Michael J. Cox, PhD

10. According to the article, what types of aberrations were induced the most by AcrySof IOLs?
a. Corneal
b. Total
c. Spherical
d. Tetrafoil

11. According to the article, which type of IOL produced the least amount of aberrations?

a. AcrySof
b. PMMA
c. MA30BA
d. MA60BM

12. For a 3.5 mm diameter pupil, the total wavefront aberration was
a. higher in PMMA group
b. lower in PMMA group
c. similar in both groups
d. higher in AcrySof group

Comparison of dyes for cataract surgery
Part 2: Efficacy of capsule staining in a rabbit model
Yi-Sheng Chang, MD, Shih-Ya Tseng, Sung-Huei Tseng, MD

13. According to the article, what was the lowest effective concentration of methylene blue for anterior capsule staining?
a. 0.25%
b. 0.01%
c. 1.25%
d. 0.10%

14. What type of dye had the lowest concentration for anterior capsule staining?
a. indocyanine green
b. methylene blue
c. trypan blue
d. gentian violet

15. What concentration of indocyanine green can cause corneal endothelial cytotoxicity in rabbits?
a. 0.1%
b. 0.25%
c. 0.5%
d. 0.75%